The making of a genetic cline: introgression of oceanic genes into coastal cod populations in the Northeast Atlantic
| Autor: | Per Erik Jorde, Torild Johansen, Mats Huserbråten, Asgeir Aglen, Geir Dahle, Frode Bendiksen Vikebø, Mari Skuggedal Myksvoll, Bjørghild Breistein Seliussen |
|---|---|
| Jazyk: | angličtina |
| Rok vydání: | 2021 |
| Předmět: |
0106 biological sciences
biology Population genetics 010604 marine biology & hydrobiology Introgression Aquatic Science biology.organism_classification 010603 evolutionary biology 01 natural sciences Fiskeriforvaltning VDP::Mathematics and natural scienses: 400 Fishery Geography Gadus Fisheries Management Populasjonsgenetikk Atlantic cod Cline (hydrology) Ecology Evolution Behavior and Systematics VDP::Matematikk og naturvitenskap: 400 |
| Zdroj: | Canadian Journal of Fisheries and Aquatic Sciences |
| Popis: | Coastal Atlantic cod (Gadus morhua) in the Northeast Atlantic has seen a continuous decline since the industrialization of the coastal fishery, and management needs to address the spatial and temporal complexities of coexisting cod stocks. Toward that end, genetic analyses and oceanographic modelling of coastal and oceanic cod larval drift patterns were combined to elucidate the mechanisms responsible for an observed genetic cline over a >1500 km stretch along the coast of Norway. The results indicate that the north–south cline in coastal cod represents an extended contact zone between genetically divergent North Sea and Northeast Arctic cod and is maintained by two-way gene flow: by northward drift of pelagic eggs and larvae and by southward spawning migrations of Northeast Arctic cod. Computer simulations verify that the genetic cline can be established rapidly if gene flow into coastal populations is substantial. The shape of the cline, on the other hand, was found to be largely insensitive to the total amount of gene flow and therefore carries little information on extent of gene flow into and among coastal populations. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|